CVE-2026-59937

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

PUBLISHED Reserved 2026-07-07 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M

Problem types

CWE-400: Uncontrolled Resource Consumption

Product status

References

github.com/.../pypdf/security/advisories/GHSA-55h5-xmcq-c37v

github.com/py-pdf/pypdf/pull/3887

github.com/...ommit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae

github.com/py-pdf/pypdf/releases/tag/6.14.0

cve.org (CVE-2026-59937)

nvd.nist.gov (CVE-2026-59937)

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